From e1cdfd27cad943290a0233119548a8dd8876bd52 Mon Sep 17 00:00:00 2001
From: Andy Belle-Isle <drumsetmonkey@gmail.com>
Date: Thu, 29 Aug 2019 20:02:35 -0400
Subject: Replaced LuaBridge with sol2 and completely encapsulated scripting
 within script system

---
 src/components/Component.hpp |  4 +-
 src/components/Position.hpp  | 14 +++----
 src/main.cpp                 | 84 ---------------------------------------
 src/script.hpp               | 93 +++++++++++++++++++-------------------------
 src/script/script.hpp        | 70 ---------------------------------
 5 files changed, 50 insertions(+), 215 deletions(-)
 delete mode 100644 src/script/script.hpp

(limited to 'src')

diff --git a/src/components/Component.hpp b/src/components/Component.hpp
index 84e860c..9c6b79d 100644
--- a/src/components/Component.hpp
+++ b/src/components/Component.hpp
@@ -19,7 +19,7 @@
 #ifndef COMPONENT_HPP_
 #define COMPONENT_HPP_
 
-#include "LuaBridge/LuaBridge.h"
+#include "sol/sol.hpp"
 
 template <typename T>
 class Component 
@@ -27,7 +27,7 @@ class Component
     public:
     Component(){};
 
-    virtual T FromLua(luabridge::LuaRef) = 0;
+    virtual T FromLua(sol::object) = 0;
 };
 
 #endif//COMPONENT_HPP_
diff --git a/src/components/Position.hpp b/src/components/Position.hpp
index aaa99f9..856b3d7 100644
--- a/src/components/Position.hpp
+++ b/src/components/Position.hpp
@@ -29,17 +29,17 @@ struct Position : Component<Position>, entityx::Component<Position>
         Position(float _x, float _y): x(_x), y(_y) {}
         Position(void){x = y = 0.0;}
 
-        Position FromLua(luabridge::LuaRef ref)
+        Position FromLua(sol::object ref)
         {
-            if (ref.isTable()){
-                if (!ref["x"].isNil())
-                    this->x = ref["x"];
-                if (!ref["y"].isNil())
-                    this->y = ref["y"];
+            if (ref.get_type() == sol::type::table){
+                sol::table tab = ref;
+                if (tab["x"] != nullptr)
+                    this->x = tab["x"];
+                if (tab["y"] != nullptr)
+                    this->y = tab["y"];
             } else {
                 throw std::string("Position table not formatted properly");
             }
-
             return *this;
         }
 };
diff --git a/src/main.cpp b/src/main.cpp
index 386aafc..3dc7bed 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -20,7 +20,6 @@
 
 #include <lua.hpp>
 #include <entityx/entityx.h>
-#include <LuaBridge/LuaBridge.h>
 
 #include "engine.hpp"
 
@@ -50,86 +49,3 @@ int main([[maybe_unused]] int argc, [[maybe_unused]] char *argv[])
 
 	return 0;
 }
-
-/*
-using namespace entityx;
-namespace lb = luabridge;
-
-EventManager events;
-EntityManager entities(events);
-
-lua_State* L;
-
-//lb::LuaRef spawn(lb::LuaRef ref)
-//{
-//    lb::LuaRef entity(L);
-//    entity = lb::newTable(L);
-//    
-//    if (ref.isTable()) {
-//
-//        Entity e = entities.create();
-//
-//        for (auto &&comp : lb::pairs(ref)) {
-//            if (comp.first.cast<std::string>() == "Position") {
-//                entity["Position"] = 
-//                    e.assign<Position>(Position().FromLua(comp.second)).get();
-//            } else if (comp.first.cast<std::string>() == "init") {
-//                entity["init"] = comp.second;
-//            }
-//        }
-//    } else {
-//        std::cerr << "Parameter to spawn() must be a table!" << std::endl;
-//    }
-//
-//    return entity;
-//}
-//
-
-ScriptSystem sc;
-
-lb::LuaRef spawn(lb::LuaRef ref)
-{
-    return sc.spawn(ref);
-}
-
-
-void LuaTest(void)
-{
-    
-    sc.configure(entities, events);
-    
-    // Functions export
-    lb::getGlobalNamespace(sc.getState())
-        .beginNamespace("game")
-            .addFunction("spawn", spawn)
-        .endNamespace();
-
-    sc.doFile();
-
-
-    //L = luaL_newstate();
-    //luaL_openlibs(L);
-
-    //lb::getGlobalNamespace(L).
-    //    beginNamespace("comp")
-    //        .beginClass<Position>("Position")
-    //            .addConstructor<void(*)(float, float)>()
-    //            .addProperty("x", &Position::x)
-    //            .addProperty("y", &Position::y)
-    //        .endClass()
-    //    .endNamespace();
-
-    //lb::getGlobalNamespace(L)
-    //    .beginNamespace("game")
-    //        .addFunction("spawn", spawn)
-    //    .endNamespace();
-
-    //if (luaL_dofile(L, "Scripts/init.lua")) {
-    //    std::cout << "Lua error: " << lua_tostring(L, -1) << std::endl;
-    //}
-
-    //entities.each<Position>([&](Entity, Position& p){std::cout << p.x << "," << p.y << std::endl;});
-
-    //lua_close(L);
-}
-*/
diff --git a/src/script.hpp b/src/script.hpp
index e9373c0..f6111d0 100644
--- a/src/script.hpp
+++ b/src/script.hpp
@@ -21,22 +21,18 @@
 
 #include <entityx/entityx.h>
 #include <lua.hpp>
-#include <LuaBridge/LuaBridge.h>
-#include <script/script.hpp>
+#include <sol/sol.hpp>
 
 /****************
 *  COMPONENTS  *
 ****************/
 #include <components/Position.hpp>
 
-namespace lb = luabridge;
-
 struct EntitySpawnEvent {
-    EntitySpawnEvent (lb::LuaRef ref)
-        : ref(ref), ret(nullptr){}
+    EntitySpawnEvent (sol::object ref)
+        : ref(ref) {}
 
-    lb::LuaRef ref;
-    lb::LuaRef ret;
+    sol::object ref;
 };
 
 /**
@@ -51,32 +47,27 @@ class ScriptSystem : public entityx::System<ScriptSystem>
          * The script systems internal lua state that handles all
          * interactions between C and Lua
          */
-        std::unique_ptr<lua_State, void(*)(lua_State *)> state;
         entityx::EventManager events;
         entityx::EntityManager manager;
 
+        sol::state lua;
+
     public:
         ScriptSystem(void)
-            : state(luaL_newstate(), lua_close),
-              manager(events){}
+            : manager(events){}
 
         ~ScriptSystem(void)
         {
 
         }
 
-        lua_State* getState()
-        {
-            return state.get();
-        }
-
         int init(void)
         {
-            luaL_openlibs(state.get());
+            lua.open_libraries(sol::lib::base);
             scriptExport();
-            //doFile();
+            doFile();
 
-            Script::CreateNewState();
+            //Script::CreateNewState();
 
             return 0;
         }
@@ -100,8 +91,9 @@ class ScriptSystem : public entityx::System<ScriptSystem>
 
         void doFile(void)
         {
-            if (luaL_dofile(state.get(), "Scripts/init.lua")) {
-                std::cout << "Lua error: " << lua_tostring(state.get(), -1) << std::endl;
+            auto result = lua.script_file("Scripts/init.lua");
+            if (!result.valid()) {
+                std::cout << "Lua error: " << std::endl;
             }
 
             manager.each<Position>(
@@ -109,51 +101,48 @@ class ScriptSystem : public entityx::System<ScriptSystem>
                     {std::cout << p.x << "," << p.y << std::endl;});
         }
 
-        lb::LuaRef spawn(lb::LuaRef ref)
+        sol::table spawn([[maybe_unused]]sol::object param)
         {
-            lb::LuaRef entity(state.get());
-            entity = lb::newTable(state.get());
+            sol::table toRet = lua.create_table_with();
+
+            //lb::LuaRef entity(state.get());
+            //entity = lb::newTable(state.get());
             
-            if (ref.isTable()) {
+            if (param.get_type() == sol::type::table) {
+                sol::table tab = param;
 
                 entityx::Entity e = manager.create();
 
-                for (auto &&comp : lb::pairs(ref)) {
-                    if (comp.first.cast<std::string>() == "Position") {
-                        entity["Position"] = 
-                            e.assign<Position>(Position().FromLua(comp.second)).get();
-                    } else if (comp.first.cast<std::string>() == "init") {
-                        entity["init"] = comp.second;
-                    }
+                if (tab["Position"] != nullptr) {
+                    toRet["Position"] = 
+                        e.assign<Position>(Position().FromLua(tab["Position"])).get();
                 }
+
+                if (tab["init"] != nullptr) {
+                    toRet["init"] = tab["init"];
+                }
+
             } else {
                 std::cerr << "Parameter to spawn() must be a table!" << std::endl;
             }
 
-            return entity;
+            //return entity;
+            return toRet;
         }
 
         void scriptExport()
         {
-            // Components export
-            lb::getGlobalNamespace(state.get()).
-                beginNamespace("comp")
-                    .beginClass<Position>("Position")
-                        .addConstructor<void(*)(float, float)>()
-                        .addProperty("x", &Position::x)
-                        .addProperty("y", &Position::y)
-                    .endClass()
-                .endNamespace();
-
-            lb::getGlobalNamespace(state.get())
-                .beginNamespace("game")
-                .endNamespace();
-
-            // Functions export
-            //lb::getGlobalNamespace(state.get())
-            //    .beginNamespace("game")
-            //        .addFunction("spawn", &ScriptSystem::spawn)
-            //    .endNamespace();
+
+            std::function<sol::table(sol::table)> func = 
+                [this](sol::table t){ return spawn(t);};
+
+            lua.new_usertype<Position>("Position",
+                    sol::constructors<Position(float x, float y), Position()>(),
+                    "x", &Position::x,
+                    "y", &Position::y);
+
+            auto gamespace = lua["game"].get_or_create<sol::table>();
+            gamespace.set_function("spawn", func);
         }
 
         void receive (const EntitySpawnEvent &toSpawn)
diff --git a/src/script/script.hpp b/src/script/script.hpp
deleted file mode 100644
index 340fd6f..0000000
--- a/src/script/script.hpp
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * Copyright (C) 2019  Belle-Isle, Andrew <drumsetmonkey@gmail.com>
- * Author: Belle-Isle, Andrew <drumsetmonkey@gmail.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef SCRIPT_NAMESPACE_HPP_
-#define SCRIPT_NAMESPACE_HPP_
-
-#include <sol/sol.hpp>
-#include <entityx/entityx.h>
-
-#include <components/Position.hpp>
-
-#include <iostream>
-
-entityx::EventManager events;
-entityx::EntityManager manager(events);
-entityx::Entity e;
-
-namespace Script
-{
-    sol::state lua;
-
-    sol::table newPosition([[maybe_unused]]sol::table tab)
-    {
-        sol::table toRet = lua.create_table_with();
-
-        e.assign<Position>(4.5, 2.3).get();
-
-        toRet["Position"] = e.component<Position>().get();
-
-        return toRet;
-    }
-
-    void CreateNewState()
-    {
-        e = manager.create();
-
-        lua.open_libraries(sol::lib::base);
-
-        //lua["q"] = Position(4.5, 3.4);
-
-        lua.new_usertype<Position>("Position",
-                sol::constructors<Position(float x, float y), Position()>(),
-                "x", &Position::x,
-                "y", &Position::y);
-
-        auto gamespace = lua["game"].get_or_create<sol::table>();
-        gamespace.set_function("testfunc", newPosition);
-
-        lua.script_file("Scripts/init.lua");
-        auto p = e.component<Position>().get();
-        std::cout << p->x << "," << p->y << std::endl;
-    }
-}
-
-#endif//SCRIPT_NAMESPACE_HPP_
-- 
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